We present a robust calibration of the 1.4 GHz radio continuum star formation rate (SFR) using a combination of the Galaxy And Mass Assembly (GAMA) survey and the Faint Images of the Radio Sky at Twenty-cm (FIRST) survey. We identify individually detected 1.4 GHz GAMA-FIRST sources and derive stellar mass selected FIRST stacks using a late-type, non-AGN, volume limited sample - extending the robust parametrisation of the 1.4 GHz-SFR relation to faint luminosities. For both the individually detected galaxies and our stacked samples, we compare 1.4 GHz luminosity to SFRs from GAMA to derive a new 1.4 GHz luminosity-to-SFR relation with improved slope and normalisation. For the first time, we produce the radio SFR-M* relation over ~2 decades in stellar mass, and find that our new calibration is robust, and produces a SFR-M* relation which is consistent with all other GAMA SFR methods. Finally, using our new the 1.4 GHz luminosity-to-SFR calibration we make predictions for the number of star-forming GAMA sources which are likely to be detected in the upcoming ASKAP surveys - EMU and DINGO-continuum.
- galaxies: star-formation
- galaxies: evolution
- radiation mechanisms: non-thermal
- radio continuum: galaxies